Pump jack



July 6 1926.

' W. E. WENTWORTH V PUMP JACK Filed Dec. 31, 1925 2 Sheets-Shut 1 July 6,1926.

W. E. WENTWORTH PUMP JACK Filed Dec. 31, 1925 2 Sheets-Sheet 2 V -1Thisinvention relates to improvements I is tobe pulled.

Patented July 6, 19 26.

' WILLLIAMJE. WENrwo'n'rrr, orfsairi rmq of srs 1:5 1'

P M d ir '1 Application file'd December31,1925. Serial No. 7 8,608 I inpump jacks and has asone of its objects to provide a -pump jack whichwill simple and substantial in construction and will operate in apositive manner and not be liable to any disarrangement of its'partsIthe being broken away to better illustrate the of pillow blo between theends ofth'esills, and.

structure, V

Figure 2 is. a top" plan I viewgof jack."

Figure 3 is a horizontal sectional View taken substantially von the line3 3 of Figthe arrows.

ure 1, looking in the direction indicated by Figure 4 is a verticaltransverse sectional View taken-substantially on: the line 44: of Figure1, looking in the directionindicated by the arrows. a

The jack embodying. the invention prises a base structure including anumber spaced sills 2, spacing blocks being disposed 4 being securedthrough th'ejsaid'ends of the sills and through the spacing blocks tosecure the sills together in parallelism. The pump casing is indicatedby the numeral 5 and the pump rod byfthe 'numeral 6, the upper end ofthepump casing beingreceived between the rear ends of the, Isills,,2.'Bearings 7 are mounted upon the sills '2 adjacent the pump casing, andashort shaft 8 is journaled. at its ends in these hearings and hasloosely, mounteduponit a head 9 to which are secured the lower ends ofspaced uprights 10 preferably of channel iron. Each of the uprights 10,.

l1, and a shaft 12 these bearin s and rotatably' supports a (sheave 13.X

-the' uprigh and in order'to prevent rearward tilting vof H 7 parts themthe sheave cks 1, which support parallel .tion, ahead bolt rodsat itsupper end, supportsa bearing, indicated by the numeral] isomounted atits ends in block 14 is disposedbetween the uprights l andsecured inplace by blots 15,:and the block has imparted to the pump a projectingboss 16 which is .receivedibetweenithe side flanges 1 17 of an l -beaml8, the web of whlch beam.- at lllSJlPPeI-flfilld; is cut away to-accommodatethe said boss. .Thebea1nl8 constitutes a'bracefor theflanges, 17 of the formed with recesses 19 adapting the' beam' uprights1 0 [and the side beam, a-tits lower end, are x at its said.end'to;straddlea cross rcdyQO mountedat itsend portionsinv the sills. 2and tween 'said sills. lower end 'of. the I-b'eaim 18, with the rodQOserves, of course, to I ts '10 under ordinary con x in at itsintermediate- 'portionzbe' V h ng gement e of {the 1 1 prevent forwardtilting of; Y

dltions,

saiduifirights a U-shaped clip'2l is engaged with the rod 20andfprovidediwith eyes 22 through which issecured .a'bolt passing- 3also through the web of the I-beam lSu-rItf willbe evidentiat.this'point, that the brace .18 serves effectually to 'maintainthe-uprights rigidlyin an upright position but that by removing the bolt23 and "the Us" clip- 21, the lower end .of the brace 18..may

be disengaged from therrod and... the.

brace moved forwardly, permitting the up rights 10 toswingv in acorresponding direction about the shaft 8 asa centerand thus assume alowered. position, carrying {with 13, and giving clearance at the timeof pulling the well.

Bearings 24 are mounted upon the sills 2,'and a shaft 25 is mounted inthe said bears tings and supports, at its intermediate. por

which is clamped this manner, ment in a forward and rearward I and abolt 3 end of the direction 0 is secured through the upper.

-a cable which ispassed over thefsheave "13 and connected at. one

26 comprisingsections,between f by'bolts 27 the lower end 28 of aswinging'postj29. -Tl1is post is, ilnfv Q supported for swinging mov e'p K 7 post' land has connected to it the side members of'a U-clip oryoke'31. The numeral 32 indicates end, by a yoke33, to the upper endofthe pump rod- 6, and the other end of this cable is connectedto one ofa turnbuckle '34,

end

the turnbucklebei'ng providedat its other end with a hook 35 which isengaged with the yoke 31', connection being, in this'rn'anner',established between the swinging "post .29 and the pump rod 6,I so

up and down reciprocatory motion willibe rod 6 through the; medium ofthe cable 32. At'thispoint that when swingi g motlon is mparted to thesaid swlnglng post,

IlO

' ing its lower endtormed to straddle the said nod, means ,separab'lyconnected with :the brace enacting with the rod to hold the 'eiiiciency.Y V 7 Having thus described the invention, what will be understood thatinstead of-the sheave l3 and cable '32, a sprocket and a chainmight beemployed with advantage.

" The numeral '36 indicates the usual rod line which extends tothe'source of power and which, in the present invention, is connected atits end to one end of a turnbuckle 37,

the other end of the turnbuckle being pro-' vided with a hook 38 engagedwith a yoke 39 which straddles the swinging post 2 9 and is connectedthereto by a bolt 4-0 which is interchangeably engageable through aseries of openings 41 formed in a vertical line in the said post 129.,it being understood that by varying the point of connection of the boltwith'the said swinging post, the extent of swinging movement of the postmay varied so as to vary imparted to the pump rod 6..

The turnbuckles' 3'4: .and 137' serve as a means whereby the verticalposition of the pump rod may be adjusted. I

From the foregoing .lescription lot the in vention, it will be seenthat-there is provided an extremely-simple and yet very substantial pumpjack construction which will operate in :a positive :tnanner and withgreat I claim is: V r V v I l. inapump "jack, a lease structure, anupright mounted thereon tor tilting movemen-t, fa hrace pivotallyconnected at its upper end with the upright a rod mounted upon the ,basestructure, the said abrace havstructure in spaced relation the strokeright and having rotatably mounted upon the upright, an upright postmounted at itslower end upon the base structure for movement toward andfrom the first mentioned upright, a flexible connection connected "atone end to the post and trained over the wheel, means at the other endof the connection for attachment of the same to a pump rod, and meansicon nected to the said :po'st ing movement thereto.

v2. In a pump jack, a base structure, upright mounted at its lowerendtor angular movement, a :fixed element upon the base for impartingswingcormecte'd with the 'upits lower end", engaged with the said fixedelement, means separably connected with said lower end of the brace andcoacting with the fixed element to hold the brace oozmected With saidele ment wherebyhy disco necting the lower a brace .pivotally to theupright,

end of the brace from the fixed element, the

upright may be permitted to assume a low-' I 'ered position, a wheelrotatably mounted upon the upper end of the upright, an "upright postmounted atits lower end for swinging movement toward :andfr-om theupright, a flexible connection connected at one end to the post andtrained overthe wheel, means at the other end of the connection forattachment of the same to a pump rod, and means connected to the postfor imparting swinging movement thereto. In testimony whereofl aiiix mysignature. WILLIAM E. ,[n St]

